Make an animated glowing border effect with CSS

Kevin Powell Media Inc.

Creative Coding CSS

June 2, 2025

I was recently asked about creating the glowing border effect from Google’s AI Mode, and it sounded like a fun challenge, so here’s how I did it!

🔗 Links

Finished Code: https://codepen.io/kevinpowell/pen/WbbXRPL??editors=1100

Inspiration: https://search.google/ways-to-search/ai-mode/